Zero Trust

What is zero trust?

Zero trust is a security approach based on the principle of “never trust, always verify”. The traditional security model assumed that anything inside the corporate network could be trusted. Zero trust rejects this concept - it treats every access request as if it originated from an untrusted network, regardless of the user’s location.

The zero trust model rests on several pillars: identity verification (strong authentication, MFA), device verification (security posture, updates, policy compliance), least privilege (users receive access only to resources necessary for their task) and continuous risk assessment (session context is monitored in real time).

Implementing zero trust is a gradual process, not a one-off project. It involves asset inventory, network segmentation, deployment of multi-factor authentication, identity and access management (IAM), micro-segmentation and monitoring. Platforms such as Microsoft Entra ID and Microsoft 365 offer tools that support building a zero trust architecture.

Why does it matter?

Remote work, cloud computing and mobile devices have rendered the traditional network perimeter obsolete. Employees connect to corporate resources from various locations and devices - the “castle and moat” model no longer fulfils its function.

Zero trust limits the impact of a compromised account or device, because the attacker does not automatically gain access to the entire network. Each subsequent step requires additional verification, which slows down lateral movement and increases the chance of detecting the attack.

Related topics

• MFA
• EDR
• SIEM
• NDR